Germanium disulfide

Names
Systematic IUPAC name

Germanium(IV) sulfide[1]

Identifiers

CAS Number

* 12025-34-2 Y

3D model (JSmol)

* Interactive image

ChemSpider |

* 74732 Y

EC Number |

* 234-705-1

PubChem CID

* 82816

InChI

* InChI=1S/GeS2/c2-1-3 Y

Key: YIZVROFXIVWAAZ-UHFFFAOYSA-N Y

* InChI=1/GeS2/c2-1-3

Key: YIZVROFXIVWAAZ-UHFFFAOYAU

SMILES

* S=[Ge]=S

Properties

Chemical formula

| GeS2
Molar mass | 136.75 g·mol−1
Appearance  | White, translucent crystals
Density | 2.94 g cm−3
Melting point |  840 °C (1,540 °F; 1,110 K)
Boiling point |  1,530 °C (2,790 °F; 1,800 K)

Solubility in water

| 0.45 g/100 mL
Solubility | soluble in liquid ammonia

Magnetic susceptibility (χ)

| −53.3·10−6 cm3/mol
Structure

Crystal structure

| monoclinic, mP36

Space group

| Pc, No. 7

Coordination geometry

| tetrahedral at Ge, bent at S
Thermochemistry

Heat capacity (C)

| 50 J /(mol K)

Std enthalpy of
formation (ΔfH⦵298)

| -150.06 kJ/mol
Related compounds

Related compounds

| Carbon disulfide

Germanium dioxide
Germanium diselenide
Germanium monosulfide
Lead disulfide
Silicon sulfide
Tin disulfide

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Y verify (what is YN ?)
Infobox references

Tracking categories (test):

* SizeSet

Germanium disulfide or Germanium(IV) sulfide is the inorganic compound with the formula GeS2. It is a white high-melting crystalline solid.[1][2] The compound is a 3-dimensional polymer,[3][4] in contrast to silicon disulfide, which is a one-dimensional polymer. The Ge-S distance is 2.19 Å.[3]

## Isolation, production, reactions

Germanium disulfide was first found in samples of argyrodite. The fact that germanium sulfide does not dissolve in aqueous acid facilitated its isolation.[5]

Germanium disulfide is produced by treating a solution of germanium tetrachloride in a concentrated hydrochloric acid solution with hydrogen sulfide. It precipitates as a white solid.[6]

It is insoluble in water, it dissolves in aqueous solutions of sodium sulfide owing to the formation of thiogermanates:

GeS
2 \+ Na
2S → Na
2GeS

## Natural occurrence

Natural GeS2 is restricted to fumaroles of some burning coal-mining waste heaps.[7]

## References

1. ↑ 1.0 1.1 Johnson, O. H. (1952). "Germanium and its Inorganic Compounds". Chemical Reviews 51 (3): 431-469. doi:10.1021/cr60160a002.
2. ↑ Golubkov, A. V.; Dubrovskii, G. B.; Shelykh, A. I. (1998). "Preparation and properties of GeS2 single crystals". Semiconductors 32 (7): 734-735. doi:10.1134/1.1187494. Bibcode: 1998Semic..32..734G.
3. ↑ 3.0 3.1 Zachariasen, W. H. (1936). "The Crystal Structure of Germanium Disulphide". Journal of Chemical Physics 4 (9): 618–619. doi:10.1063/1.1749915. Bibcode: 1936JChPh...4..618Z.
4. ↑ Kulikova, L. F.; Lityagina, L. M.; Zibrov, I. P.; Dyuzheva, T. I.; Nikolaev, N. A.; Brazhkin, V. V. (2014). "High-pressure, high-temperature study of GeS2 and GeSe2". Inorg. Mater. 50 (8): 768–774. doi:10.1134/S002016851408010X.
5. ↑ Winkler, C. (1886). "Mittheilungen über das Germanium". Journal für Praktische Chemie 34 (1): 177-229. doi:10.1002/prac.18860340122. http://gallica.bnf.fr/ark:/12148/bpt6k90797z/f185.table.
6. ↑ P. W. Schenk (1963). "Germanium Disulfide". in G. Brauer. Handbook of Preparative Inorganic Chemistry, 2nd Ed.. 2pages=723-724. NY,NY: Academic Press.
7. ↑ "Unnamed (Ge Sulphide)". https://www.mindat.org/min-39607.html.

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Germanium compounds

Ge(II)|

* GeCl2
* GeF2
* GeI2
* GeO
* Ge(OH)2
* GeS
* GeSe
* GeTe

Ge(IV)|

* GeF4
* GeCl4
* GeO2
* GeS2

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Sulfides

| H2S
H2S2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | He

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Li2S | BeS |  |  |  |  |  |  |  |  |  |  | B2S3 | CS2
COS | (NH4)SH | O | F | Ne
Na2S
Na2Sx | MgS |  |  |  |  |  |  |  |  |  |  | Al2S3 | SiS
SiS2 | PxSy | S | Cl | Ar
K2S | CaS | Sc2S3 | TiS2 | V | CrS
Cr2S3 | MnS
MnS2 | FeS
Fe3S4 | CoS | NiS | Cu2S
CuS | ZnS | GaS
Ga2S3 | GeS
GeS2 | As2S3
As4S3 | SeS2 | Br | Kr
Rb2S | SrS | Y2S3 | ZrS2 | NbS2 | MoS2 | Tc | Ru | Rh2S3 | PdS | Ag2S | CdS | In2S3 | SnS
SnS2 | Sb2S3
Sb2S5 | TeS2 | I | Xe
Cs2S | BaS | *  | HfS2 | TaS2 | WS2
WS3 | ReS2
Re2S7 | Os | Ir2S3
IrS2 | PtS
PtS2 | Au2S
Au2S3 | HgS | Tl2S | PbS
PbS2 | Bi2S3 | Po | At | Rn
Fr | Ra | **  | Rf | Db | Sg | Bh | Hs | Mt | Ds | Rg | Cn | Nh | Fl | Mc | Lv | Ts | Og |  |  |  |  |  |  |  |
|  | ↓ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| * | La2S3 | CeS
Ce2S3 | Pr2S3 | Nd2S3 | Pm2S3 | SmS
Sm2S3 | Eu2S3 | Gd2S3 | Tb2S3 | Dy2S3 | Ho2S3 | Er2S3 | Tm2S3 | Yb2S3 | Lu2S3 |
| ** | Ac | ThS2 | Pa | US2 | Np | Pu | Am | Cm | Bk | Cf | Es | Fm | Md | No | Lr |

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